In the laboratory, concentrated hydrogen chloride acid reacted with aluminum.hydrogen gas evolved was collected over water at 25°c and had a Volume of 355cm3 at a total pressure of 750mmHg. the vapor pressure of water at 25°c =24mmHg calc...
a the partial pressure of hydrogen
b the number of moles of hydrogen collected
6HCl + 2Al ==> 2AlCl3 + 3H2
a.
Ptotal = pH2 + pH2O
750 mm Hg = pH2 + 24 mm
Solve for partial pressure H2 = pH2.
b. Use PV = nRT
n = PV/RT = pH2 from above*0.355 L/0.08206*(273+25) = # moles.
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